岩体抗剪强度参数的结构面倾角效应

通过对泥质粉砂岩、泥质灰岩抗剪强度参数的层面倾角效应研究。以及石膏模型试件力学性质的结构面倾角效应研究，就结构面倾角对层状、似层状岩体抗剪强度参数产生的影响进行了较详细的剖析，阐明了层状、似层状结构岩体力学性质各向异性的本质和机理。并在此基础上对受倾角效应影响的层状、似层状岩体抗剪强度参数取值进行了较深入的分析，提出了较为客观的、极具参考价值的层状、似层状结构岩体抗剪强度参数的取值原则。分别得到了层状结构粉砂岩、泥质粉砂岩、泥质砂岩以及薄层的层状结构灰岩、片岩、板岩的系列强度参数与结构面倾角口的相关公式。层状、似层状结构石膏模拟试件不同裂隙倾角条件下的室内三轴剪切试验研究进一步表明。新提出的相关公式可作为类似结构岩体抗剪强度参数在不同层面倾角下的取值参考。

DIP EFFECT OF STRUCTURAL PLANE ON SHEARING STRENGTH PARAMETERS OF ROCK MASS

Through researching the dip effect of layer plane on the shearing strength parameters of argillaceous siltstone and limestone and the dip effect of structural plane on the mechanical property of gypsum samples,the dip influence of structural plane on the parameters of shearing strength of stratiform and stratified structures is analyzed in detail,and the mechanism of anisotropy of mechanical property of stratiform and stratified structure is discussed. The principle of determining shearing strength parameters of stratiform and stratified structur is put forward. The correlation formulas between the dip of structural plane and parameters of stearing strength are established for different kinds of stratiform and stratified rock masses,respectively. The triaxial tests of gypsum samples of stratiform and stratified structures show that the proposed formulas are useful for determination of shearing strength of the similar rock structures.